<template>
  <div class="app-container">
    讲师表单
     <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">

          <!-- 头衔缩略图 -->
          <pan-thumb :image="teacher.avatar"/>
          <!-- 文件上传按钮 -->
          <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
          </el-button>

          <!--
      v-show：是否显示上传组件
      :key：类似于id，如果一个页面多个图片上传控件，可以做区分
      :url：后台上传的url地址
      @close：关闭上传组件
      @crop-upload-success：上传成功后的回调 
        <input type="file" name="file"/>
      -->
          <image-cropper
                        v-show="imagecropperShow"
                        :width="300"
                        :height="300"
                        :key="imagecropperKey"
                        :url="BASE_API+'/eduoss/fileoss'"
                        field="file"
                        @close="close"
                        @crop-upload-success="cropSuccess"/>
      </el-form-item>

      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>

  </div>
</template>
<script>

    import teacherApi from '@/api/edu/teacher'
    import ImageCropper from '@/components/ImageCropper'
    import PanThumb from '@/components/PanThumb'

    export default {

        components: { ImageCropper, PanThumb },

        data(){
            return{
                teacher: {
                    name: '',
                    sort: 0,
                    level: 1,
                    career: '',
                    intro: '',
                    avatar: ''
                },

                //上传头像弹窗是否显示
                imagecropperShow: false,
                imagecropperKey: 0, //上传组件key值
                BASE_API: process.env.BASE_API, //获取dev.env.js里面地址
                saveBtnDisabled: false
            }
        },

        // created() {
        //     const id = this.$route.params.id
        //     if(id){
        //         this.getInfo(id)
        //     } else {
        //         this.teacher = {}
        //     }
        // },

        created() { //页面渲染之前执行
            this.init()
        },
        watch: {  //监听
            $route(to, from) { //路由变化方式，路由发生变化，方法就会执行
            this.init()
            }
        },

        methods: {

            close() { //关闭上传弹窗方法
                this.imagecropperShow = false
                this.imagecropperKey = this.imagecropperKey+1
            },

            cropSuccess(data) { //上传成功方法
                //上传之后接口返回图片地址
                this.imagecropperShow = false
                this.teacher.avatar = data.url
                this.imagecropperKey = this.imagecropperKey+1
            },

            init() {
                //判断路径有id值,做修改
                if(this.$route.params && this.$route.params.id) {
                    //从路径获取id值
                    const id = this.$route.params.id
                    //调用根据id查询的方法
                    this.getInfo(id)
                } else { //路径没有id值，做添加
                    //清空表单
                    this.teacher = {}
                }
            },
            
            //通过id获取讲师信息
            getInfo(id) {
                teacherApi.getTeacherInfo(id)
                .then(response => {
                    this.teacher = response.data
                })
            },

            //添加或修改
            saveOrUpdate(){
                //通过是否含有id判断是添加还是修改
                if(!this.teacher.id){
                    //添加
                    this.saveTeacher()
                } else {
                    //修改
                    this.updateTeacher()
                }
            },

            //修改稿讲师
            updateTeacher(){
                teacherApi.updateTeacherInfo(this.teacher)
                .then(response => {
                    
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '修改成功!'
                    });
                    //回到列表
                    this.$router.push({path: '/teacher/table'})

                })
            },

            //添加讲师
            saveTeacher() {
                teacherApi.addTeacher(this.teacher)
                .then(response => {
                    
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '添加成功!'
                    });
                    //回到列表
                    this.$router.push({path: '/teacher/table'})

                })
            },

        }
    }
    
</script>